The Simplest Forms of Life. 155. 



become attached, and set free the spermatozoids. The latter pass from 

 the cell, the roof-like cover being opened, and enter the oogoium 

 through the opening likewise prepared, and fertilize the contents, from 

 which now a single resting spore is formed. 



1. Gen. CEdogoniu?n, Link. Unbranched, often hair-like fila- 



ments at the ends, at first growing attached, later free, 

 forming intricate, floating masses. Species numerous. . 



CE.capillare, Ktz. Cells 0.033 d., and of equal or twice 

 this length, with spherical spores, which entirely fill the 

 slightly turgid sporangium. Very common, and often 

 forms " meteoric paper." 



(E.foniicola, Al. Br. Similar to the former, but spores angular, 



CE.miniitum^ Ktz. Only 0.005. 



CE.lumidulii?H, Ktz. Cells 0.03 d., 2-6 times longer ; spores 

 spherical, loose, in elliptical sporangium. 



CExiliatiim, Hass. Cells o.oi d. (? 0.02), 2-6 times as long. 

 Terminal cell bristle-like, transparent, very long. Basal 

 cell club-shaped, with spread-out or disk-like foot, at- 

 tached to water plants. Sporangia egg-shaped, much 

 inflated, entirely filling the spore. 



CE.capillaceuni, Ktz. Cells 0.0 1 d., of equal length, or twice 

 as long, with roundish egg-shaped spores, that fill the 

 slightly turgid sporangium. In large masses. 



2. Gen. Bulbochcete, Ag. Short, branching, jointed cells, 



often on other Algae, with club-shaped, thickened cells 

 which bear laterally above a long bristle with a thick- 

 ened bulbiform base. 



B. setigera, Ag. Cells 0.02 d., 2-5 times as long. Spores 

 spherical, verrucose, not entirely filling the sporangium. 



Genus. Chantra?isia, Desv. Jointed filaments branching, cylin- 

 drical, with delicate, transparent membrane, and red or 

 bluish contents. 



Ch.Chalybea, Fries. Cells 0.0 1 d, tufted, of about i cm. in 

 length. Springs and brooklets. 



ORDER III. PALMELLACE^. 

 Single celled, chlorophyll-green Algae, of round or elongated form» 

 living singly, or together in families. 



FAMILIES AND GENERA. 



Multiplying only by free cell formation (swarm- 

 spores), ProtococcacecE, Ng. 



